Stable solution of hydrogen peroxid and method of making same.



UNITED STATES PATENT UEETQE,

WALTER HEINRICI, OF HALLE-ON-THESAALE, GERMANY.

STABLE SOLUTION OF HYDROGEN PEBOXID AND METHOD OF MAKING SAME.

T all whom it may concern:

Be it known that I, WALTER Hammer, a subject of the Prince of Schwarzburg-Sondershausen, in the German Empire, residing in llalle-on-the-Saale, Prussia, Germany, have invented a new and useful Process of Pro- T d ucing Stable Solutions of Hydrogen Peroxid,

of which the following is a full, clear, and exact specification.

This invention relates to a process by which technical solutions of hydrogen peroxid, which, in consequence of the presence of acids, such as sulfuric acid, phosphoric acid, acetic acid, etc, are morestable for practical use than pure solutions, are made,

Specification of Letters Patent.

Application filed August 2. 1906. SerialNo. 328.90

Patented Jan. '7, 1908.

(Specimens) hydrogen peroxid of commerce (technical product) containing a percentage of acid equal to 3 /4 of sulfuric acid, and a like sample of hydrogen peroxid containing say 1/20 phenacetin, are preserved for many months under similar conditions, the sample Without the addition of phenacetin loses 40 7;, of its contents of hydrogen peroxid, while the one mixed with phenacetin loses onlyS 7; of its contents of hydrogen peroxid.

I claim as my invention:

1. A process for increasing the stability of a solution of hydrogen eroxid of acid constitution which consists in adding an organic amide-derivative to such solution.

2. A stable solution of hydrogen peroxid containing free acid and an admixture of organic amido-derivatives, substantially as described.

In testimony whereof I have signed my name to thisv specification, in the presence of two subscribing witnesses.

WALTER HEINRICI. Vi itnesses:

RUDOLPH iFRICKE, HERMANN EBER. 

